I was diagnosed with epilepsy about 10 years ago (the result of an RTA in 1995), but only had 3 minor episodes over a period of 3 years, and then nothing until this year. I've woken up a few times and not remembered what I did the previous day. They've said it's TEA, and I suppose it must be, although what I experience doesn't seem to match the pattern I read about. The main problem is that it frightens other people, and most doctors have probably never come across it in the flesh before.
I've on Lamotrogine for my epilepsy and they've just increased the dose and so far so good. What I would suggest is that you find out all you can about it and educate those close to you so that they don't cart you off to hospital, where the staff probably won't know what TEA is and insist you mean TIA!